package com.ywy.dao;

import java.util.List;

import com.ywy.entity.User;

public interface UsersService {
	
	//根据user_id查询User
	public User selectUserById(int user_id);
	
	//用户登录
	public boolean userLogin(String user_name,String user_pwd);
	
	//展示所有用户信息
	public List<User> selectAllUsers();

}
